ARS19200LUBATN-H_技术文档

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

DESCRIPTION

2

-

FEATURES AND BENEFITS

• Integrated diagnostics and certified safety design process

The ARS19200 is a Hall-effect-based integrated circuit (IC)

thatprovidesauser-friendlysolutionfortruezero-speeddigital

ring magnet sensing in two-wire applications. TheARS19200

is offered in the UB package, which integrates the IC and a

hightemperatureceramiccapacitorinasingleovermoldedSIP

package. The integrated capacitor provides enhanced EMC

performance with reduced external components.

for ASIL B compliance

• Integrated capacitor reduces need for external EMI

protection components

• True zero-speed operation

• Single chip sensing IC for high reliability

• Fully synchronous digital logic with Scan and IDDQ

testing

• Application-proven algorithms for robust operation in

wheel speed environments

TheICisideallysuitedforobtainingspeedinformationinwheel

speed applications. The Hall element spacing is optimized for

high resolution, small diameter targets. The package is lead

(Pb) free, with tin leadframe plating.

PACKAGE: 2-pin SIP (suffix UB)

Not to scale

Functional Block Diagram

VCC

Internal Regulator

Analog to

Offset

Adjust

Output

Control

Digital

Controller

Amp

AGC

Digital

Converter

GND

ARS19200-DS, Rev. 3

MCO-0000375

May 18, 2018

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

SELECTION GUIDE

Part Number

Packing

Power-On State

I_CC(LOW)

ARS19200LUBATN-L

ARS19200LUBATN-H

4000 pieces per 13-in. reel

I_CC(HIGH)

ABSOLUTE MAXIMUM RATINGS

Characteristic

Symbol

V_CC

Notes

Rating

28

Unit

V

Supply Voltage

Reverse Supply Voltage

Operating Ambient Temperature

Maximum Junction Temperature

Storage Temperature

V_RCC

T_A

–18

V

L temperature range

–40 to 150

165

°C

T_J(max)

T_stg

–65 to 170

INTERNAL DISCRETE CAPACITOR RATINGS

Characteristic

Symbol

Test Conditions

Value (Typ.)

Unit

Nominal Capacitance

C_SUPPLY

Connected between VCC and GND

2200

pF

Terminal List Table

Name

Number

Function

1

2

VCC

1

Supply Voltage

Ground

GND

2

UB Package, 2-Pin SIP Pinout Diagram

2

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

OPERATING CHARACTERISTICS: Valid throughout full operating and temperature ranges, unless otherwise speciﬁed

Characteristic

ELECTRICAL CHARACTERISTICS

Supply Voltage ^[2]

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Unit

V_CC

V_CC(UV)

I_RCC

Operating, T_J< T_J(max)

4.0

–

3.6

–

24

3.95

–10

–

V

Undervoltage Lockout

Reverse Supply Current ^[3]

Supply Zener Clamp Voltage

Supply Zener Current

V_CC0 → 5 V or 5 → 0 V

V_CC= V_RCC(max)

–

mA

V

V_ZSUPPLYI_CC= I_CC(max) + 3 mA, T_A= 25°C

I_ZSUPPLYT_A= 25°C, V_CC= 28 V

28

–

19

mA

OUTPUT

-H variant

POS

–

I_CC(HIGH)

–

Power-On State

Supply Current

-L variant

I_CC(LOW)

–

I_CC(LOW)Low-current state

I_CC(HIGH)High-current state

5.9

12

–

8.4

16

mA

I_{CC(HIGH) /}Measured as ratio of high current to low current

I_CC(LOW)(isothermal)

Supply Current Ratio

ASIL Safety Current

Output Rise, Fall Time

1.9

1.0

0

–

I_RESET

3.3

1.5

mA

μs

Corresponds to measured output slew rate with

C_SUPPLY; R_LOAD= 100 Ω, C_L= 10 pF

t_r, t_f

OPERATING CHARACTERISTICS

Operate Point

B_OP

B_RP

f_FWD

% of peak-to-peak IC-processed magnetic signal

–

0

60

40

–

5

%

Release Point

Operating Frequency

kHz

Continued on the next page…

ꢀ

CC

1

ꢀCC

ARS19200

ꢁNꢂ

ꢃ

R

100 Ω

L

C

L

Figure 1: Typical Application Circuit

3

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges, unless otherwise

speciﬁed

Characteristic

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Unit

OPERATING CHARACTERISTICS (continued)

Input Signal

B_SIG

B_SIGEXT

TC

Differential signal, measured peak-to-peak

20

–

1200

300

G

Allowable User-Induced Differential

Offset

External differential signal bias (DC), operating

within specification

–300

Sensitivity Temperature Coefficient ^[4]

Total Pitch Deviation

–

+0.2

–

%/°C

%

For constant B_SIG, sine wave

±2

No missed output edge. Instantaneous

Maximum Sudden Signal Amplitude

Change

B_SEQ(n+1)symmetric magnetic signal amplitude change,

/ B_SEQ(n)measured as a percentage of peak-to-peak B_SIG

(see Figure 2)

–

0.6

0.2

–

Overall symmetric magnetic signal amplitude

change, measured as a percentage of peak-to-

Maximum Total Signal Amplitude

Change

B_SEQ(max)

/B_SEQ(min)

peak B_SIG

^[1]Typical values are at T_A= 25°C and V_CC= 12 V. Performance may vary for individual units, within the speciﬁed maximum and minimum limits.

^[2]Maximum voltage must be adjusted for power dissipation and junction temperature; see representative discussions in Power Derating section.

^[3]Negative current is deﬁned as conventional current coming out of (sourced from) the speciﬁed device terminal.

^[4]Ring magnets decrease strength with rising temperature. Device compensates. Note that B_SIGrequirement is not inﬂuenced by this.

B

SEQ(n)

B

SEQ(n+1)

Figure 2: Diﬀerential Signal Variation

4

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

THERMAL CHARACTERISTICS

Characteristic

Symbol

Test Conditions*

Value

Unit

Package Thermal Resistance

R_θJA

Single-layer PCB with copper limited to solder pads

213

°C/W

*Additional thermal information is available on the Allegro website.

Power Derating Curve

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

V_CC(max)

8

7

6

5

4

V_CC(min)

3

2

20

40

60

80

100

120

140

160

180

Temperature (ºC)

Power Dissipation versus Ambient Temperature

1900

1800

1700

1600

1500

1400

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

0

20

40

60

80

100

120

140

160

180

Temperature (ºC)

5

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

FUNCTIONAL DESCRIPTION

Determining Output Signal Polarity

Hall Technology

In Figure 5, the top panel, labeled Mechanical Position, repre-

sents the mechanical features of the ring magnet or gear target

and orientation to the device. The bottom panel, labeled Device

Output Signal, displays the square waveform corresponding

to the digital output signal that results from a rotating target

configured as shown in Figure 4. That direction of rotation (of

the target side adjacent to the package face) is: perpendicular to

the leads, across the face of the device, from the pin 1 side to the

pin 2 side. This results in the device output switching from high

to low output state as a north magnetic pole passes the device

face. In this configuration, the device output voltage switches to

its high polarity when a south pole is the target feature nearest to

the device. If the direction of rotation is reversed or if a part of

type ARS19200LUBx-L is used, then the output polarity inverts

(see Table 1).

This single-chip differential Hall-effect sensor IC contains two

Hall elements as shown in Figure 3, which simultaneously sense

the magnetic profile of the ring magnet or gear target. The mag-

netic fields are sensed at different points (spaced at a 1.75 mm

pitch), generating a differential internal analog voltage, V_PROC

,

that is processed for precise switching of the digital output signal.

The Hall IC is self-calibrating and also possesses a temperature-

compensated amplifier and offset cancellation circuitry. Its

voltage regulator provides supply noise rejection throughout the

operating voltage range. Changes in temperature do not greatly

affect this device due to the stable amplifier design and the offset

rejection circuitry. The Hall transducers and signal processing

electronics are integrated on the same silicon substrate, using a

proprietary BiCMOS process.

Target Profiling During Operation

An operating device is capable of providing digital information

that is representative of the mechanical features of a rotating

gear or ring magnet. The waveform diagram in Figure 5 presents

the automatic translation of the mechanical profile, through the

magnetic profile that it induces, to the digital output signal of the

ARS19200. No additional optimization is needed and minimal

processing circuitry is required. This ease of use reduces design

time and incremental assembly costs for most applications.

Table 1: Output Polarity when a South Pole Passes the

Package Face in the Indicated Rotation Direction

Part Type

Rotation Direction

ARS19200LUBx-H

I_CC(HIGH)

ARS19200LUBx-L

I_CC(LOW)

Pin 1 → Pin 2

Pin 2 → Pin 1

I_CC(LOW)

I_CC(HIGH)

Branded Face

of Package

Rotating Target

(Ring magnet or

ferromagnetic)

Ring Magnet

S

N

S

N

S

N

Target

N

S

N

Ferromagnetic

Target

Tooth

Valley

Pin 1

Pin 2

Element Pitch

Hall Element 1

Rotation from pin 1 to pin 2

Hall Element 2

Package Case Branded Face

(Top View of

Package Case)

Pin 2

Side

Pin 1

Side

IC

Branded Face

of Package

Rotating Target

(Ring magnet or

ferromagnetic)

South Pole

North Pole

Back-Biasing Magnet

(Externally applied for

ferromagnetic target)

N

S

N

S

N

Pin 1

Pin 2

Rotation from pin 2 to pin 1

Figure 3: Relative Motion of the Target

Figure 4: Target Orientation Relative to Device

(ring magnet shown).

Relative Motion of the Target is detected by the dual Hall elements

mounted on the Hall IC.

6

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

N

Element Pitch

Package Case Branded Face

Package Case

Branded Face

Device Orientation to Target

(Top View of

Package Case)

(Top View of

Package Case)

(Pin 1 Side)

(Pin 2 Side)

E2

(Pin 1 Side)

Element Pitch

IC

(Pin 2 Side)

E2

E1

IC

E1

South Pole

North Pole

External

Back-Biasing Magnet

Mechanical Position (Target moves past device pin 1 to pin 2)

Target

This pole

sensed later

This pole

sensed earlier

(Radial Ring Magnet)

Target

(Ferromagnetic)

This tooth

sensed earlier

This tooth

sensed later

N

S

N

Target Magnetic Profile

+B

Speed Channel

Element Pitch

+B

–B

IC Internal Differential Analog Signals, V_PROC

B_OP(#1)

B_OP(#2)

B_OP(#1)

B_OP(#2)

Speed

Channel

B_RP(#1)

Device Output Signal,I_OUT

+t

Figure 5: Basic Operation

7

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

Magnetic

ꢂncoder

S

ꢀ

S

ꢀ

S

ꢀ

ꢅ_{CCꢆHꢅꢇHꢈ}

ꢅ_{CCꢆLꢀꢉꢈ}

Normal

ꢀꢁeration

ꢅ_{CCꢆHꢅꢇHꢈ}

ꢂrror

ꢂꢃamꢁle 1

ꢅ_{CCꢆLꢀꢉꢈ}

ꢅ_RꢂSꢂꢊ

ꢅ_{CCꢆHꢅꢇHꢈ}

ꢂrror

ꢂꢃamꢁle ꢄ

ꢅ_{CCꢆLꢀꢉꢈ}

ꢅ_RꢂSꢂꢊ

Figure 6: Output Protocol with ASIL Safety Current

8

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

POWER DERATING

The device must be operated below the maximum junction

temperature of the device, T_J(max). Under certain combinations of

peak conditions, reliable operation may require derating supplied

power or improving the heat dissipation properties of the appli-

cation. This section presents a procedure for correlating factors

affecting operating T_J. (Thermal data is also available on the

Allegro MicroSystems website.)

A worst-case estimate, P_D(max), represents the maximum allow-

able power level (V_CC(max), I_CC(max)), without exceeding T_J(max)

at a selected R_θJAand T_A.

,

Example: Reliability for V_CCat T_A=150°C, package UB, using

minimum-K PCB.

Observe the worst-case ratings for the device, specifically:

R_θJA=213°C/W, T_J(max)=165°C, V_CC(max)= 24 V, and

I_CC(max)= 16 mA.

The Package Thermal Resistance, R_θJA, is a figure of merit sum-

marizing the ability of the application and the device to dissipate

heat from the junction (die), through all paths to the ambient air.

Its primary component is the Effective Thermal Conductivity, K,

of the printed circuit board, including adjacent devices and traces.

Radiation from the die through the device case, R_θJC, is relatively

small component of R_θJA. Ambient air temperature, T_A, and air

motion are significant external factors, damped by overmolding.

Calculate the maximum allowable power level, P_D(max). First,

invert equation 3:

ΔT_max= T_J(max)– T_A= 165°C–150°C = 15°C

This provides the allowable increase to T_Jresulting from internal

power dissipation. Then, invert equation 2:

The effect of varying power levels (Power Dissipation, P_D), can

be estimated. The following formulas represent the fundamental

relationships used to estimate T_J, at P_D.

P

_D(max)= ΔT_max÷R_θJA=15°C÷213°C/W=70.4mW

Finally, invert equation 1 with respect to voltage:

_CC(est)= P_D(max)÷ I_CC(max)= 70.4mW÷16.0mA=4.4 V

The result indicates that, at T_A, the application and device can

dissipate adequate amounts of heat at voltages ≤V_CC(est)

V

P_D= V_IN

I

(1)

(2)

(3)

×

IN

ꢀ

ΔT = P_D

R

θJA

×

.

T_J= T_A+ ΔT

Compare V_CC(est)to V_CC(max). If V_CC(est)≤ V_CC(max), then reli-

able operation between V_CC(est)and V_CC(max)requires enhanced

R_θJA. If V_CC(est)≥ V_CC(max), then operation between V_CC(est)and

V_CC(max)is reliable under these conditions.

For example, given common conditions such as: T_A= 25°C,

V_CC= 12 V, I_CC= 14 mA, and R_θJA= 213 °C/W, then:

P_D= V_CC

I

= 12 V 14 mA = 168 mW

CC

×

ΔT = P_D

R

= 168 mW 213°C/W = 35.8°C

θJA

×

T_J= T_A+ ΔT = 25°C + 35.8°C = 60.8°C

9

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

PACKAGE OUTLINE DRAWING

For Reference Only – Not for Tooling Use

(Reference DWG-0000408, Rev. 3)

Dimensions in millimeters

Dimensions exclusive of mold ﬂash, gate burrs, and dambar protrusions

Exact case and lead conﬁguration at supplier discretion within limits shown

+0.06

4.00

–0.05

B

4 × ꢀ0°

E

1.75

1.50 0.05

E

1.125

0.65 0.07

C

E

1.54

Mold Ejector

Pin Indent

+0.06

4.00

E

E1

–0.07

E2

E

XXXXX

Date Code

Lot Number

Branded

45°

Face

A

0.85 0.05

4 × 2.50 0.ꢀ0

4 × 0.85 REF

0.25 REF

0.30 REF

0.42 0.05

D

Standard Branding Reference View

2.54 REF

Line 1 = Part Number (5 characters)

Line 2 = Date Code (4 digits)

Line 3 = Characters 5-8 of

Assembly Lot Number

ꢀ

2

18.00 0.10

A

Dambar removal protrusion (8×)

ꢀ.00 0.ꢀ0

ꢀ2.20 0.ꢀ0

4 × 7.37 REF

B

C

D

E

F

Gate and tie bar burr area

+0.07

–0.03

Active Area Depth, 0.38 0.03 mm

0.25

1.80

0.10

Branding scale and appearance at supplier discretion

Hall elements (E1 and E2); not to scale

Molded Lead Bar for preventing damage to leads during shipment

0.38 REF

0.25 REF

4 × 0.85 REF

0.85 0.05

+0.06

1.80

–0.07

F

+0.06

1.50 0.05

4.00

–0.05

Figure 7: Package UB, 2-Pin SIP

10

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ARS19200

ASIL-Compliant Wheel Speed Sensor IC

Revision History

Number

Date

Description

–

1

2

March 9, 2017

May 19, 2017

July 11, 2017

Initial preliminary release

Corrected part number (page 2)

Removed Chopping references

Status changed from Preliminary to Final, removed t_RESET, updated Figure 6, updated Package

Outline Drawing, and other editorial updates

3

May 18, 2018

Allegro MicroSystems, LLC reserves the right to make, from time to time, such departures from the detail specifications as may be required to

permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that

the information being relied upon is current.

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of

Allegro’s product can reasonably be expected to cause bodily harm.

The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its

use; nor for any infringement of patents or other rights of third parties which may result from its use.

Copies of this document are considered uncontrolled documents.

For the latest version of this document, visit our website:

www.allegromicro.com

11

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com


型号：	ARS19200LUBATN-H
厂家：	ALLEGRO MICROSYSTEMS
描述：	ASIL-Compliant Wheel Speed Sensor IC
文件：	总11页 (文件大小：646K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ARS19200LUBATN-H [ALLEGRO]

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